Patents
Literature
Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

759 results about "Manufacturing quality" patented technology

As customer expectations have risen over time, manufacturing quality has come to be an absolute requirement, regardless of where products are manufactured, distributed, and sold. Assuring manufacturing quality entails three principal functions: quality design and engineering, quality control, and quality management.

Water turbine blade blank profile measuring and machining allowance analyzing method

The invention relates to a water turbine blade blank profile measuring and machining allowance analyzing method capable of effectively solving the problem of water turbine blade blank profile measurement and machining allowance analysis to ensure the manufacturing quality and precision of the water turbine blades, comprising the following technical solutions: measuring the blade blanks by using a digital close range photogrammetry to obtain the measuring point cloud data shapes of the blank profiles consequently, aligning a measuring coordinate system where the measuring point clouds are located to a design coordinate system where a CAD design model is located, establishing a differential relation of free-form surface parameters with respect to rigid rotation parameters by using an analytic method derived by the multivariate of Newton iteration method to obtain a Jacobian matrix and Hessian matrix which are available for a target equation; then performing the numerical optimization calculation based on the LM method and Newton iteration method, and performing report or graphical output and print on the result. The inventive method is scientific, advanced, stable and reliable, and has high accuracy, thereby ensuring the hydraulic stability, production efficiency and cavitation property, and bringing enormous economic and social benefits.
Owner:郑州辰维科技股份有限公司

Multi-point flexible positioning tool

The invention discloses a multi-point flexible positioning tool which comprises a plurality of rectangular coordinate type flexible support die blocks and a base, wherein the plurality of rectangular coordinate type flexible support die blocks are arranged and fixed on the upper surface of the base; an X-direction sliding panel in each rectangular coordinate type flexible support die block is driven by a driving mechanism to do straight reciprocating motion along an X-direction straight guide track; and a Y-direction sliding panel in each rectangular coordinate type flexible support die block is driven by the driving mechanism to do straight reciprocating motion along a Y-direction straight guide track. The multi-point flexible positioning tool can ensure precise positioning of a thin-walled curved part, rapidly form an optimal support array which is matched with the surface of the part according to three-dimensional information and machining information of the thin-walled curved part to be clamped under the control of a computer control unit, and alleviate the deformation of a workpiece which is stressed and heated in a machining state, thus improving the manufacturing quality and the manufacturing efficiency of the part; and moreover, the tool can also be taken as an assembling tool to assemble the thin-walled curved part, and can effectively improve the machining efficiency and the machining quality of the part.
Owner:XIAN WINWAY TOOLS

Laser coaxial powder feeding composite manufacturing machine tool and workpiece composite manufacturing method

The invention discloses a laser coaxial powder feeding composite manufacturing machine tool which comprises a cradle type workbench, a spindle, a material additive manufacturing mechanism, a material reducing machining mechanism and an online defect detection mechanism. The material additive manufacturing mechanism comprises a nozzle and a powder feeding device connected with the nozzle. A laser head is arranged at the position of the nozzle and connected with a laser generator. The material additive manufacturing mechanism is clamped by a nozzle bracket. The material reducing machining mechanism comprises a tool, a tool magazine and a tool changing bracket. The online defect detection mechanism comprises a defect detection head and a detection signal collection and analysis system. The invention further discloses a workpiece composite manufacturing method. The process of the workpiece composite manufacturing method mainly comprises the steps that material additive manufacturing, online defect detection and material reducing machining are carried out cyclically, and finally composite manufacturing is completed. By means of compounding of material additive manufacturing, material reducing machining and online defect detection, one-time forming of workpieces high in size precision and surface quality and low in internal defect is guaranteed, the production period is effectively shortened, and the part manufacturing quality and precision are guaranteed.
Owner:DALIAN UNIV OF TECH

Matching error calculation method for error transfer modeling of precision mechanical system

The invention discloses a matching error calculation method for error transfer modeling of a precision mechanical system. The method comprises the following steps of: measuring shape errors D1 and D2 of two matching surfaces by applying a three-coordinate measuring machine to obtain data of a difference surface, and determining a contact point according to the data of the difference surface; calculating deformation errors delta 1 and delta 2 of the two matching surfaces of a part according to the contact point and assembly force applied to the two matching surfaces, thereby obtaining actual matching surface data D1+delta 1 and data D2+delta 2 considering the shape errors and the deformation errors of the two matching surfaces of the part; and calculating matching error component of the two actual matching surface to obtain matching error so as to be used for error transfer modeling of the precision mechanical system. In the method, the shape errors of the matching surfaces and the part deformation errors produced under the action of the assembly force are considered, a more accurate error transfer model can be established for the precision mechanical system on the basis, and the accuracy for the manufacturing quality prediction and control is improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Selective laser fusion composite manufacturing machine tool and workpiece composite manufacturing method

The invention discloses a selective laser fusion composite manufacturing machine tool. The selective laser fusion composite manufacturing machine tool comprises a lifting workbench, a main shaft, a material increase manufacturing mechanism, a material decrease manufacturing mechanism and a defect detection mechanism capable of detecting workpiece defects online. The material increase manufacturing mechanism comprises a laser scanning system and a powder feeding device; the laser scanning system is connected with a laser generator; the powder feeding device comprises a powder box and a scraper plate. The material decrease manufacturing mechanism comprises a tool, a tool magazine and a tool-changing bracket. The defect detection mechanism comprises a defect detector and a detection signal collection and analysis system. The invention further discloses a workpiece composite manufacturing method. The method mainly includes the step of conducting selective laser fusion material increase manufacturing, defect detection and material decrease processing in a circulating mode till composite manufacturing is completed finally. By combination of the selective laser fusion material increase manufacturing, material decrease processing and defect detection, it is ensured that workpieces with high size precision, high surface quality and low internal defects are formed at a time, the production period is shortened effectively, and the part manufacturing quality and precision are ensured.
Owner:DALIAN UNIV OF TECH

Emulsion pump testing system

The invention relates to an emulsion pump testing system, comprising an electrical apparatus control system which is used for driving a motor to start or stop, a transmission box connected with a tested pump, an emulsion pump circulating system and a hydraulic oil circulating system for driving the transmission box; the working load of the tested pump is changed by adjusting the discharging amount of an oil hydraulic motor, hydraulic pressure output by the tested pump is compensated to the oil hydraulic motor mostly by a loading cylinder, namely, the oil hydraulic motor is not only a driving force source of the tested pump, but also is a load of the tested pump; the system can carry out reliability detecting test to the emulsion pump with different type and different power, and the comprehensive performance and manufacturing quality of the emulsion pump are detected in an on-line way, therefore, the occupying area of the equipment is not only reduced, but also the operating power can not be converted into heat energy, so as to reduce the operating cost; the most important point is that the power can be recycled, the energy consumption is greatly reduced; compared with the prior art, the energy saving can reach about 70 percent, the structure is simple and energy-saving, and has good using effect.
Owner:CHINA UNIV OF MINING & TECH +1

Laminated structure hole manufacturing online monitoring self-adaptive machining method

The invention discloses a laminated structure hole manufacturing online monitoring self-adaptive machining method. The laminated structure hole manufacturing online monitoring self-adaptive machining method comprises the following steps that (1), a hole manufacturing cutter installed on a numerical control machine tool is adopted to manufacture holes in laminated structures of carbon fiber reinforced composite materials and alloy materials, the distance between the laminated structure hole forming position reached by the bottom end of the hole manufacturing cutter and the material interface in the laminated structures is measured through an ultrasonic thickness measurement method, and then the distance signal is transmitted to a control system of the numerical control machine tool with the hole manufacturing cutter after being processed; (2), the control system of the numerical control machine tool compares the received distance signal with a set value 0, if the distance value is greater than 0, the control system of the numerical control machine tool still outputs an initial control signal, and if the distance value is 0, the control system of the numerical control machine tool outputs a new preset control signal to change the spindle rotation speed and feeding speed of the hole manufacturing cutter. By the adoption of the method, the laminated assembly hole manufacturing quality and hole machining efficiency can be improved, and the cost is lowered.
Owner:TIANJIN UNIV

Stretch-bending molding process of angle steel component of vehicle body

The invention relates to a stretch-bending molding process of an angle steel component of a vehicle body and mainly aims to scientifically and rationally overcome the defects of overlarge rebound modulus and section bending deflection of workpieces and the like during the stretch-bending molding of the angle steel component of the vehicle body. The process realizes the emulation of pretension and post-tension corresponding to the minimum rebound modulus, provides a computing formula for the initial length of profiles and a trajectory model of a clamp, improves the forming quality, precision and work efficiency of a stretch-bending workpiece and the manufacturing quality of vehicle steel structure, reduces the manufacturing and maintenance cost, overcomes stretch-bending defects and provides basis for the stretch-bending molding precision control of profile parts. The process initially establishes a mathematical model for length rebound modulus of a multi-curvature profile, can precisely determine the initial length of a blank profile of parts, determines the optimal pretension and post-tension by a simulation method and precisely determines the trajectory of the clamp by establishing a multi-curvature profile stretch-bending module, thereby obtaining the ideal forming quality of the formed profile.
Owner:白城市瑞程汽车部件有限公司

Auxiliary device for manufacturing cable head

The invention provides an auxiliary device for manufacturing a cable head, comprising a stand, a rotary cutting mechanism, a linear cutting mechanism and a press mechanism, wherein the stand is provided with support legs and a working table plate articulated with the support legs; the working table plate is provided with a cable wire placing groove along a length direction; a rotary cutting tool rest is arranged at one end of the working table plate; a linear cutting tool rest is arranged on a linear sliding rail; the linear sliding rail is connected to a working table plate side and parallel to the working table plate; the press mechanism is provided with a supporting seat and a press plate arranged on the supporting seat; the supporting seat is connected to the side surface of the working table plate; and the press plate is provided with a pressing wire groove opposite to the cable wire placing groove positioned on the working table plate up and down. The auxiliary device is used for completing the fast striping and cutting of a cable wire protective layer during the manufacture of the cable head and accurately controlling the striping and cutting length and depth of the cable wire protective layer, thereby enhancing the manufacturing quality of the cable head and reducing the labor intensity of operators; in addition, the auxiliary device is portable after be folded, has convenient and fast assembly and disassembly of parts and is very suitable for being used as a striping and cutting tool on a manufacturing site of the cable head.
Owner:STATE GRID CHONGQING ELECTRIC POWER COMPANY SKILLTRAINING CENT +1

Flexible positioning device for assembling and welding pipelines

The invention relates to a flexible positioning device for assembling and welding pipelines and belongs to the technical field of assembling and welding of pipe parts. A flange positioning assembly, a pipe joint positioning assembly, a pipe fitting bearing assembly and a telescope-feed positioning assembly are all arranged on a foundation plate, and adapting seats of the assemblies are connected with one another through positioning keys and T-shaped grooves. According to the flexible positioning device for assembling and welding the pipelines, by means of matching of the assemblies, accuracy of assembling and welding pipe fittings is improved, shape correction of the pipe fittings during assembling is reduced, manufacture qualities and reliabilities of the pipe fittings are improved, the assemblies can be adjusted, and requirements for assembling and welding the pipe fittings with different sizes and shapes can be well met by adjusting positions and heights of the assemblies when users are confronted with the pipe fittings with different sizes and shapes, so that the applicability of the flexible positioning device is greatly enhanced; the flexible positioning device can be continuously recycled and greatly reduce usage and manufacture costs; defects that medium frames in prior art are low in positioning accuracy, poor in rigidity, easy to deform during using, and long in manufacture period can be overcome.
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products